Multiple-arbor draw-press.



H. A. STAPLES.

MULTIPLE ARBOR DRAW PRESS.

APPLICATION FILED JUNE I? Patented Feb. 4, 1919.

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APPLICATION FILED JUNE 17, 1918.

Patented Feb. 4, 1919.

3 SHEETS-SHEET 2.

ATTORN EY H. A. STAPLES.

MULTIPLE ARBOR DRAW PRESS.

APPLICATION FILED JUNE I?. 191B.

1,293,28L e l Peteneed Feb. 4,1919.

3 SHEETS-SHEET 3- INvENToR www ATToRNEY HORACE A. STAPLES, F BRIDGEPORT,CONNECTICUT.

i MULTIPLE-ARIEGE DRAWhPRESS.

To all whom t may concern v Be it known that I, HORACE A. STAPLES, a

' citi-zen of the United States, residing at 1052 2, looking in thedirection ofthe Fig. 6 a fragmentary `plan view, partly y the line 10-10in `the type of l rapid iire guns,

Laurel Ave., Bridgeport, county of Fairfield, State of Connecticut, haveinvented an Improvement in Multiple-Arbor Draw- Presses, of which thefollowing is aspecification.

This invention relates more especially to presses used in the productionof either hot or cold drawn seamless tubing, as inthe manufacture ofcartridge shells for and the invention has for its objects to simplify,erally improve the construction and operation of this ,class of pressesand to greatly increase their production.

With these and other objects in view, I have devised the novel multiplearbor draw press' which I will now describe referring to theaccompanying drawings forming apart of this specification and using'reference characters to indicate the several parts. Figure 1 is a planview of my novel press, partly broken away, the arbors being in thenormal or retracted position;

Fig. 2 a side elevation partly 'broken away, corresponding with Fig. 1;

Fig. 3al plan view showing the drawing mechanism only, the arbors beingat the extreme. of their forward movement; t

Fig. 4 a section; on an enlarged scale, on the line 4-4 in Fig. 2lookingin the direction of the arrows, illustratlng lmeans forcausingthe arborto'escillate; A

Fig. 5 a section -on'the line 5`-5in Fig.

arrows;

broken away, on a still larger vscale showing the arbor head and the-inner ends of the arbors and illustrating various details ofconstruction;

Fig. 7 a section on the line .7 7 in Fig. 6;

I4 ig. 8 a detail sectional'view corresponding with Fig. 4,but'illustrating a modification in which the arbor head iscaused torotate instead of oscillate;

Fig.` 9 a modificationl in which the arb-orV hea is caused toreciproca-te; -Y

Fig 10 a section, on an enlarged scale,'on

Fig. 9, looking in the .direction of the arrows, and

Fig. l1 is a section on the line 11,'-11 in Specication of LettersPatent.

-ent instance, is t cheapen and to genfragmentary plan view, corre-`sponding with Fig.- 1, but illustratin a` A Patented Feb. 4, 1919.

Application led June 17, 1918. Serial No. 240,397.

Fig. 10, looking in the direction of the arrows.

20 denotes the plunger which, in the prese piston rod of a hydraulicram. It 1s unimportant, however, so far as the present invention isconcerned, by what power the plunger is operated. 21 denotes thecylinder of the ram at the forward end of which is a frame block 22provided with a stuffing box 23 through which the plunger passes. 24, 25and 26 denote guide bars which are engaged by flanges 27 and 28, and akey 29 upon a carriage 30. At the forward end of the guide bars is aframe block 31. Frame blocks 22 and 31f are rigidly connected by tierods 32 which extend longitudi-l nally through the guide bars, arethreaded at their ends and are engaged by'nuts- 33.

The cylinder of the ram, guide bars 24 and 25 and frameblocks 22 and 31rest upon suitable legs or supports, indicated by 34. 35 denotes a tierod extending between' frame blocks 22 and 31 which also serves as astationary shaft. 39 denotes the arbors which are carried by an arborhead 40 which has motion in a plane transverse to the plunger. t

InV the present instance the movement is an oscillation in an arc of180. The arbor head is provided with a hub 44 which has a bearing in asleeve 43, itself seated in the carriage and retained in place by a ringnut 45 engaging the end of the hub. 36 denotes a tubular shaft which ismounted to turn upon tie rod or shaft 35. The arbor head is'V secured tothe tubular shaft by means of# keys 41 which engage grooves 42 in theshaft. At the inner end of the tubular shaft is a pinion 37'which isengaged by a rack v 8 to lmpart oscillatory movement to said shaft andthe arbor head. In addition to its oscillatory movement with the tubularshaft, the arbor head has longitudinal movement relatively to saidshaft, as will be more fully explained.

The arbors are shown as provided with heads 47 which are socketed in therear face of the head and retained in place by pins 46. The heads of thearbors are concentric with beveledrecesses 48 which are adapted toreceive .and center the end f the plunger which, it will be noted, bearsboth on the arbor and on the arbor head. In addition to these points ofbearing the plunger is provided with a collar 49 which bears against thecarriage. ln order to retain the dit arbor head rigidly in placerelatively to the carriage so that they must move longitudinallytogether and to prevent any side strain on the arbor head when subjectedto the stress of the plunger, I provide the carriage with a recess 75which receives the arbor carrying portion of the arbor head, the thrustof the plunger being taken up by an overhang 59 against which theforward end of the arbor head bears, the idea being to insure astructure that will fully take up the` side strain resulting from theuse of a movable arbor head. It will be obvious that when the end of theplunger is seated in one of the recesses, the arbor head will be lockedagainst rotation. The plunger must, therefore, be connected to thecarriage in such a manner as to permit limited independent movement ofthe plunger, that is suicient to permit the latter to be withdrawn fromthe beveled recess and thus release the arbor head before the carriageis picked up. I provide the plunger with a reduced portion 50 andprovide a split block 51 of less width than said reduced portion throughwhich the plunger passes freely. This block is seated in the carriage,the parts thereof being locked in place by set screws 52. 53 denotes thedie, with which the arbors cooperate in turn and which is seated inframe block 31 in alinement With the plunger, see Fig. 1. In order torelieve the arbors from strain and prevent. the possib-ility ofbuckling, I provide a guide block 5s through which the arbors pass andin which they may have reciprocatory movement. The guide block is keyedto the tubular shaft, see Fig. 5, and rotates therewith and may alsohave longitudinal movement thereon. The guide block is connected to thearbor head by distance rods 55 which are rigidly connected to the guideblock and slide freely through lugs 56 on the arbor head. These distancerods are provided with heads 57 on the rear side of the lugs. Springs 58may or may not be interposed between the heads and the-lugs.

As already stated the movement of the arbor head is not necessarily anoscillatory movement, although I have illustrated that in the presentinstance as a preferred form. Turning now to Fig. 4, it will be notedthat pinion 37 on the tubular shaft is engaged by a rack 38. It is notimportant, so far as the principle of the invention is concerned, howthis track is reciprocated. In the present instance I have shown therack as a continuation of the piston 60 of a small hydraulic ram,indicated as a whole by 61. The operation of this ram is so timed as toproduce an actuation of the rack, which in turn produces a half rotationof the arbor head, the instant the latter reaches its retractedposition, as in Fig. 1. In Fig. 8 I have illustrated a modification 1nwhich pinion 37 is engaged by a pinion 6:2 on a shaft 63 to Whichintermittent rotary movement may be imparted in any convenient manner,each actuation of the shaft imparting a half rotation to the tubularshaft and arbor head.

In the form illustrated in Figs. 9, 10 and 11, the arbor head is causedto reciprocate transversely which necessitates changes in the details ofconstruction. The tubular shaft and accompanying parts are dispensedwith. The carriage 64 is provided with three keys 65 which engagegrooves in guide bars 66. The arbors are carried by an arbor head 67which is caused to reciprocate transversely to the plunger in a way 68in the carriage. A stop block 69 secured to the carriage and engaging agroove 74 in the arbor head limits the movement of the arbor head ineach direction. Means for reciprocating the arbor head is not shown asspeci cally it forms no part of the present invention. The reducedportion 50 of the plunger is engaged by a split ring 7 2, seated in thecarriage, which is held in place by a nut 73 engaging the carriage.

The operation is as follows: Fig. 3 shows the position of the parts atthe end of the drawing operation, the drawn tube being indicated bydotted lines at 70. lVhile the drawing operation is proceeding, theoperator places a tube or shell, indicated by dotted lines at 71, on theother arbor, it being understood of course that the blanks for thismachine are partly drawn tubes. At the end of a drawing operation, z'.e. during the return movement of the plunger, arbor head, etc., thedrawn blank is removed from the arbor by stripping mechanism, not shownas specifically' it forms no part ot' the present invention. So far asthe principle of the invention is concerned it is immaterial whether theend of the plunger is withdrawn from the recess in the rbor head tounlock the latter, at the beginning or at the end of the backwardmovenient of the plunger. As shown in the drawing, the carriage, arborhead and arbors would be drawn backward through the engagement of thewall at the front end of reduced portion 50 of the plunger with splitblock 51. During the return movement the drawn tube will have beenstripped from its arbor and the operator will have placed a tube orshell on the other arbor. The half rotation ot the arbor head now takesplace and places the arbor carrying a partly drawn tube in position forthe drawing operation, during which the operator will place another tubeor shell on the empty arbor.

Having thus described my invention, I claim:

1; A multiple arbor draw press comprising a die, an arbor head, arborscarried thereby, a shaft by which the arbor head is Y ing a plunger, adie,

' motion in a transverse plane and havin ,30.

cillat'e on the tie rod 20 carried and on which the arborhead haslongitudinal movement, a plunger adapted to actuate the arbor head, andmeans for imparting motion to the arbor head in a -plane transverse ytothe axis of the plunger.

2. A multiple arbor draw press comprising a carriage, guide bars onwhich the'carriage has longitudinal movement, an arbor head-having ahub, a tubular shaft by which the arbor head iscarried and on which ithas longitudinal movement,- a tie rod, said shaft being mounted torotate on the rtie rod and the hub hav`ng a bearing in the head. c

" carriage, and means foractuating the arbor 3. A multiple arbor drawpress compris' ing a plunger, a die, a carriage, a tie rod, and an arborhead which is mounted toosa hub havingl a bearing in the carriage.

4. A multiple arbor drawv press comprisan arborhead having motioiiin atransverse plane and having beveled recesses adapted to receive andcenter the plunger, and arbors seated in the arbor head in alinementwith the recesses. '5. A' multiple arbor draw press comprising aplunger, and an arbor headl having arbors, and .recesses in line withthe arbors which are adapted to be engaged by the plunger.

.6. A multiple arbor draw press comprising guide bars, a carriageadapted to reciprocate on the guide bars, a tie rod, a tubular shaftmounted to oscillate on the tie rod, an arbor head mounted to oscillatewith the tubular shaft and having longitudinal moveand havinga hub whichhas a bearing vin the carriage, and a ,plunger riage.

7. A' multiple arbor draw press comprising guide bars, 'a'` carriageadapted to reciprocatev on the guide bars, a tie rod, a tubular shaftmounted to oscillate on Athe tie rod, an arbor head which oscillateswithl the tubular shaft and has longitudinal movement thereon, saidarbo'r head having a hub with a bearing in the carriage, a

plunger, anda connection between the plun- .gen and the ,carriage` thatwill permit i imited independent movement of the plunger. 8. A multiplearbor draw press comprising a reciprocating carriage, an oscillatingshaft an arbor head which oscillates with the shaft, has longitudinalmovement thereon and is provided with a hub having a bearing in thecarriage, a plunger, and a connection between the plunger and thecarriage that will permit independent movement of the plunger.

9. A multiple arbor draw press comprisand is provided with i ently ofthe carriage,

ging a reciprocating .with recesses,

ing a reciprocating carriage, shaft, an arbor head having a hub with abearing in the carriage, and recesses, said arbor head oscillating withthe shaft and having longitudinal movement thereon, a plunger having areduced portion, and a split block of less width than the reducedportion through which the reduced portion passes and which is seated inthe carriage, the engagement of the forward end of the plunger with arecess locking the arbor head against oscillation, and backward movementof the plunger before the carriage is picked upy leaving the arbor headunlocked.

10. A multiple arbor draw press comprising a reciprocating carriage, anoscillating shaft, an arbor head oscillating with the shaft and havinglongitudinal movement thereon, means for holding the arbor head againstlongitudinal movement independa plunger having a reduced portion, and asplit block of less width than the reduced portion through which thereduced portion passes and which is seated in the carri-age, wherebylimited movement o f the plunger independently of the carriage ispermitted.

. 11. A multiple arbor draw press compriscarriage having a recess, anoscillating shaft and an arbor h ead which oscillates with the shaft,has longitudinal movement thereon and is adapted to an oscillatingengage the recess in the carriage, for the pur-y pose set forth.

12. A multiple arbor draw press comprising a reciprocati and anoverhang, an oscillating shaft, an arbor head which oscillates with theshaft, has longitudinal movement thereon and is adapted to engage therecess, and a plunger connected to the carriage and adapted to engagethe arbor head to move the latter and the carriage longitudinally, thethrust of the plunger being taken up by the engagement of thearbor headwith the overhang.

13. A multiple arbor draw press comprising a reciprocatin carriagehavinga recess, an oscillating sha aii arbor head which oscillates with theshaft, has longitudinal movement thereon and is adapted to engage therecess, a plunger, and a connection b etween the plunger and thecarriage that will permit limited independent movement of the plunger,forthe purpose set forth.

14; A multiple arbor draw press comprismovement thereon, is adapted toengage the recess in the carriage and is itself provided a plunger whichis adapted t omove the arbor head and carriage longitudinally and toengage a recess in the arbor head to lock the latter and the shaftagainst g carriage having a recess oscillation, and a connection betweenthe plunger and the carriage that will permit limited movement of theplunger to release the arbor head.

15. A multiple arbor draw press comprising a reciprocating carriage, anoscillating shaft, an arbor head which oscillates with the shaft, andhas longitudinal movement thereon, a connection between the arbor headand thel carriage which prevents independent reciprocatory movement ofeither, arbors carried by the arbor head, a guide block through whichthe arbors passy and which rotates with the shaft and has longitudinalmovement thereon, and distance rods between the guide block and thearbor head.

16. A multiple arbor draw press compris* ing a reciprocating carriage,an oscillating shaft, an arbor head provided with lugs which oscillateswith the shaft and has longitudinal movement thereon, means forpreventing independent reciprocation of the arbor head and carriage,arbors carried by the arbor head, a guide block through which the arborspassand which rotates with the shaft and has longitudinal movementthereon, distance rods rigidly connected to the guide block, passingthrough the lugs on the arbor head and themselves provided with heads,and springs between the heads of the distance rods and the lugs on thearbor head. 17. A multiple arbor draw press comprising a carriage, anoscillating shaft, an arborv head which oscillates with the shaft andhas longitudinal movement thereon, a plunger adapted to engage the arborhead and having a collar engaging the carriage, and a connection betweenthe plunger and the carriage that will permit limited backward movementof the plunger.

. 18. A multiple arbor draw ress compris- 'mg a carriage, an oscillatings aft, an arbor head which oscillates with the shaft, has longitudinalmovement thereon, and is provided with recesses, a plunger whichactuates the arbor head and the carriage and locks the latter againstoscillation by engagement with the recess, and a connection between theplunger and the carriage that will permit limited backward movement ofthe plunger to release the arbor head.

19. A multiple arbor draw press comprising a carriage, an oscillatingshaft, an arbor head which oscillates with the shaft and haslongitudinal movement thereon, arbors seated inthe arbor head, thelatter having beveled recesses in alinement with the arbors, a plungeradapted to engage said recesses in alinement with the arbors and havinga collar adapted to engage the carriage, and a connection between theplunger and the carriage that will permit limited backward movement ofthe plunger.

20.' A multiple arbor draw press comprisA ing a carriage, an oscillatingshaft, an arbor head which oscillates with the shaft and haslongitudinal movement thereon, arbors seated in the arbor head, avplunger adapted to engage the arbor headv in alinement with an arbor, aconnection between the plungerv and the carriage that will permitlimited independent movement of the plunger,- and a connection betweenthe arbor head and the carriage that will cause the latter to take upthe thrust of the plunger.

In testimony whereof l affix my signature.

HORACE A. STAPLES.

